A fine needle probe for determining the thermal conductivity of penetrable materials
- 18 December 2000
- journal article
- Published by IOP Publishing in Measurement Science and Technology
- Vol. 12 (1), 58-62
- https://doi.org/10.1088/0957-0233/12/1/307
Abstract
A fine needle probe for determining the thermal conductivity of penetrable materials such as fluids, fruit and animal flesh has been developed. The present probe is constructed by inserting twenty strands of copper wire with electrical insulation coating into a fine stainless steel needle. The copper wire serves both as a heating unit and as an electrical resistance thermometer. The effects on the thermal conductivity measurement caused by the thin needle wall have been analysed. It is found that the effects can be negligibly small if the instruments and the measurement procedure are adequately designed. The usability of the as-constructed apparatus for penetrable materials has been tested to measure the thermal conductivities of liquid, fruit and animal flesh. The accuracy of the present measurement was estimated to be within ±3%.Keywords
This publication has 14 references indexed in Scilit:
- Transient thermal conductivity measurements: comparison of destructive and nondestructive techniquesHigh Temperatures-High Pressures, 2000
- Heat Transfer in Living Systems: Current OpportunitiesJournal of Heat Transfer, 1998
- The Future of Biothermal EngineeringaAnnals of the New York Academy of Sciences, 1998
- Scanning probe microscopy of thermal conductivity and subsurface propertiesApplied Physics Letters, 1992
- Thermal Property Measurements on Biological Materials at Subzero TemperaturesJournal of Biomechanical Engineering, 1991
- Kelvin probe force microscopyApplied Physics Letters, 1991
- Thermal conductivity and diffusivity of biomaterials measured with self-heated thermistorsInternational Journal of Thermophysics, 1985
- Absolute measurement of the thermal conductivity of electrically conducting liquids by the transient hot-wire methodJournal of Physics E: Scientific Instruments, 1981
- Simultaneous measurement of the thermal conductivity and the thermal diffusivity of liquids by the transient hot-wire methodReview of Scientific Instruments, 1981
- An apparatus to measure the thermal conductivity of liquidsJournal of Physics E: Scientific Instruments, 1976